down fowler -- john fowler joins us live with more. good afternoon, john? >> reporter: good afternoon, tori. within the last three minutes, firefighters confirm the leak has been at least temporarily capped. it's there at that corner of meridian and burnett. businesses here for four blocks are shut down. this is what it sounded like here at concord's auto center. >> you are in the commercial area with several customers inside doing business. we estimate between 50, 75 people had to be evacuated. >> reporter: firefighters say cona construction backhoe -- a construction back dehoe hit a line and firefighters and police evacuated the kia and toyota dealerships and other businesses. the fire department says somehow this happened despite having notified pg&e. let's take a listen. we've seen people trying to cross through here. the firefighters say the risk of fire and explosions is significant here. they are also trying to monitor for gas. it's heavier than aerosol. they are looking for them. pg&e was notified about the construction and somehow this accident sti